<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>辅助情景</title>

    <!-- Bootstrap -->
    <link href="bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
        p{
            padding: 10px;
            margin: 10px;
        }
    </style>

</head>
<body>
    <div class="container">
        <p class="text-muted">hello,我是 dora</p>
        <p class="text-primary">hello,我是 dora</p>

        <p class="bg-info">hello,我是 dora</p>
        <p class="bg-success">hello,我是 dora</p>
        <p class="bg-warning">hello,我是 dora</p>
        <p class="bg-primary">hello,我是 dora</p>
        <p class="bg-danger">hello,我是 dora</p>
        <button type="button" class="close" aria-label="Close"><span aria-hidden="true">&times;</span></button>

        <span class="caret"></span>
         <!--快速浮动-->
        <br/>
        <br/>
        <div class="pull-left">float-left</div>
        <div class="pull-right hidden">float-right</div>
    </div>
</body>
</html>